Nut-lock.



H. M. BURRELL.

NUT LOOK.

APPLICATION FILED 001'. 11, .1911

1,024,973. Patented Apr. 30, 1912.

FIG. 1

WITNESSES IN VENTOR JEnryMBzeriZZ ATTORNEYS STATES arana OFFICE.

nanny M. Bennett, or rrrrsnunsrr, PENNSYLVANIA.

HUT-LOSE.

eaner/s.

Application filed Gctober 11, 1911. Serial Ho. 654,034.

To all whom it may concern Be it known that I, HENRY M. BURRELL, a citizen of the United States of America, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain -new and useful Improvements in Nut-Locks, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to nut locking devices, and the objects of my invention are to provide positive and reliable means in a manner as will be hereinafter specifically set forth, for locking a nut upon a bolt whereby the nut can not be accidentally displaced, and to provide a nut locking device that can be advanmgeously used in connection with rail joints, bridges, rolling stock,

. and structures subjected to vibrations.

not locking device. Fig. 2 is a cross sectional view of the same. Fig. 3 is a perspective view of a detached wedge, and Fig. l is an elevation of a detached malleable pin adapted to form part of the device.

The reference numerals 1 and 2 denote by Way of example two pieces of material having registering openings 3' to receive a bolt a having a head 5 engaging the piece of ma terial 1 and an oval portion 6 extending into said piecesof material to prevent the bolt from rotating. The threaded end of the bolt protrudes from the piece of material 2 and the threaded end of the bolt is provided with'a horizontal slit or slot 7 extending throughout the threaded portion and into the smooth "portion of the bolt. The belt adjacent to the ehd'there'of has a tr nsverse 1 Specification of Letters Patent.

ratentean so, 1912.

bolt prior to driving the wedge in the end of the bolt. The wedge 9 has a central opening 11 and passing through said opening and the opening 8 of the bolt is a malleable pin 12. This pin has a head 13 atone end thereof and the opposite end can be bent, as at 15 to frietionally engage the outer face of the nut 10. The bent end of the pin c0-' operating with the expanded end of the bolt in retaining the nut 10 upon the bolt and in engagement with the piece of material 2.

It is apparent from the foregoing that the nut 10 can not become displaced and that the nut locking device can be used in connection with various kinds of nuts, it

being only necessary to split and aperture 1 the end of the bolt and then provide the wedge and'pin for locking a nut upon the bolt.

What I claim is In combination a bolt, provided with a slit extending through the threaded portion and into the smooth portion thereof, said bolt further having in proximity to the outer terminus of its threaded portion a transverse opening intersecting said slit, a nut mounted upon the threaded portion of the bolt, an apertured wedge mounted in the outer portion of the slit of the bolt for expanding the' end of the latter and binding the threads of the bolt against the threads of the nut, and

a headed malleable pin extending through said opening and through said wedge and bent to frictionally engage the nut, thereby binding the pin in position, said pin constituting means to prevent the slipping out of the wedge.

In testimony whereof I affix my signature in the presence of two witnesses.

HENRY M. BURRELL. 

